System Sensor DH100LP Procedure for verifying air flow, Filter Replacement, D200-15-00

the duct smoke detector housing, and the LOW side of the transmitter to the exhaust tube of the duct smoke detec- tor housing. Measure and record the voltage drop across the 1000Ω resistor (measurement 2). Subtract the voltage recorded in measurement 1 from the voltage recorded in measurement 2. If the difference is greater than 0.15 volts, there is enough air flow through the duct smoke detector for proper operation.

Figure 7. Procedure for verifying air flow:

TO SAMPLING TUBE

TO EXHAUST TUBE

HIGH LOW

DIFFERENTIAL

PRESSURE

TRANSMITTER

15 TO 36VDC

SUPPLY

9 VOLT

BATTERY

9 VOLT

BATTERY

1000 OHM 5% 1 WATT RESISTOR	9 VOLT
	BATTERY

VOLT METER

FLUKE MODEL 87

OR EQUIVALENT

[6.1.5] Filter Replacement

The filters do not substantially affect smoke performance even when up to 90% of the filter is clogged. Quarterly visual inspection usually suffices to determine whether the filters should be replaced because only a high percentage of contamination affects performance. If further testing is required, compare differential pressure readings with and without the filters installed. If the difference exceeds 10% replace the filters. In no case should the pressure differen- tial fall below 0.0015 inches of water.

[6.2] Standby, Alarm, And Sensitivity Tests [6.2.1] Standby And Trouble

Standby — Look for the presence of the flashing green LED through the transparent housing cover. The LED should flash approximately every 10 seconds.

Trouble — If the Green LED does not flash, then the de- tector lacks power (check wiring, panel, or power supply), the detector board is missing (replace), or the unit is defective (return for replacement).

Figure 8. System wiring diagram for 2-wire duct smoke detectors (detectors powered from initiating circuit):

CAUTION

Do not loop wire under terminals when wiring detectors. Break wire runs to provide system supervision of connections.

UL LISTED	1ST DETECTOR			LAST DETECTOR
COMPATIBLE 2-WIRE
	IN LOOP DH100LP			IN LOOP DH100LP
CONTROL PANEL
	DETECTOR			DETECTOR		EOL RESISTOR
						SPECIFIED BY
	BOARD			BOARD
						PANEL MANUFACTURER
	7	6		7	6
(+)
	(+) IN	(+) OUT		(+) IN	(+) OUT
	4		(+)	4	(+)
		(+)			(+)		E
			RA400Z (OPTIONAL)			RA400Z (OPTIONAL)
							O
ALARM			REMOTE ALARM LED			REMOTE ALARM LED
INITIATION		(–)			(–)		L
	5			5			R
LOOP			(–)2.8 VDC NOM.		(–)	2.8 VDC NOM.
			IN ALARM			IN ALARM
	8			8
(–)	(–) IN	(–) OUT		(–) IN	(–) OUT

STYLE D OPTIONAL WIRING

A78-2696-00

Figure 9. Wiring diagram for the DH100LP to RTS451/RTS451KEY:

DH100LP
Test +	1
Test / Reset –	2
Reset +	3
RA +	4
RA –	5

RTS451/RTS451KEY

5

Test

4

3

1 Alarm Reset

LED

2

A78-2697-00

D200-15-00 6 I56-0083-07R